The amount of gold held at Fort Knox has fluctuated over the years. It was at its greatest amount during World War II when several European governments moved their gold reserves to Kentucky for safe keeping. At this time, the amount of gold at Fort Knox peaked at 20,205 metric tons (650 million oz. troy).
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From 2007 to 2010, Gilbert has appeared in episodes of the CBS TV series The Big Bang Theory as Leslie Winkle, a scientist friend of Leonard Hofstadter played by Johnny Galecki, who had previously played Gilbert's love interest David Healy on Roseanne.